Rough scroll through the ledger

I am currently using:
erpnext 12.1.3
frappe 12.0.13

I am facing problem when scrolling the any ledger report like “General ledger”,“Accounts Receivable”, “Accounts Receivable Summary”. The transition is very rough and not smooth as it should be. It used to be very smooth while I was using V7. Kindly shed some light and possible fix on it.